Sand-blast apparatus.



Patented Fei121, 1911.

ATT n'RNEY.

. EBELING.

SAND BLAST APPARATUS. APPLICATION FILED FEB` 12, 1910.

\ atented Feb. 21, 1911.

INVENTD .@ZMJ/ ATTURNEX@ 5 E 5 5 E N .H

y UNlTED STATES SAND-BLAST Param? OFFICE.

arrana'rns.'

` specificati@ of Letters Patent.V Patelflgd Feb. 21, 1911.

Application filed February 12, 19170. l Seriall No. 543,625.

To all whom it may concern.; p

Be it known that l, CHARLES W. EBELING, a citizen of the United States 'o'f Americay 'and resident. of Elm Grove, county of Ohio,

a-nd State of West Virginia, have invented certain new and useful Improvements in Sand-Blast Apparatus, of which the following -is a specification.

This invention relates broadly to sandblast apparatus, and specifically to a device for sand-blasting metal bath-tubs and the like.

The primary object of the invention is to provide an automatically yoperated appara-L vthe blast-nozzles the entire surface of the tus for smoothing the surfaces of cast-iron bath-tubs, removing the roughness andnnevenness, and'also removing the dust and sand which adhere to the surface of the tub after the latter 4is removed from the sand in. which it is castrendering said surfaces suitable for receiving an enamel or other sux'- face coatingv or finish. l Y

, AA further object is to provide a sand-blast apparatus in which the article treated is rotated so as to present within the range of article. A still furtherobjeet of the invention is to provide, in an apparatus of the character mentioned, blast-nozzles having means associated "therewith whereby said nozzles are caused to automatically vpry their positions as the articleacted upon*"rotates, so that in a completev` revolutionV of said article the entire surface thereof will be subjected to the abrading blasts fronisaid nozzles.

Other importantobjects will be in part apparent and in. part explained hereinafter. TheV invention accordingly consists in the 4.features of construction, combinations of ele ments and arrangement of parts which will hereinafter be exemplified and fully described, reference being had tothe accompanying drawings, forming a partof this specification, in WhichvFigurel is a top plan view of the invention; Fig. 2 is aside elevation of the same, a portion Vof the casing-Wall being broken away; Fig. 3 is an enlarged sectionon the line 3 -3, Fig. 1 and Fig. 4 is a longitudinal section of the carriage on which the upper blast-nozzle is mounted, the latter being shown in the position assumed in blasting the top of the rim of a bath-tub.

Referrimg` to said drawings, in which like reference characters designate like parts "casing or inclosing wall, preferably of substantially circular form and having an overlying top or cover 2, said wall being supported by suitably-located posts 3. Located centrally within the inclosure constituted by said wall 1 is a suitable base or foundation 4 upon which is rotatably mounted a gear wheel 5 which meshes with a worm .6 carried by a drive-shaft 7, and overlying said gear- ,wheel and rotatable therewith is a supporting table 8 adapted for receiving thereon a said article being admitted to the interior of the -inclosure through a suitable door 10 provided in the wall 1.

In the'top or cover 2 is provided a longitudinal slotf'oropening 11 in which a blast nozzle 12 is adapted to move when so actuated, said nozzle being pivotally mounted upon a movable carriage consisting of con 'nected side members 14 mounted upon wheels or rollers 15 which travel upon the inner base flanges 16 of parallel guide-bars 16 located on opposite sides of said opening 11.

A cable 17, which is passed over a pulley 18 journaled in the rear end ofthe carriage, thence around a sheave 13 mounted horizontally at a point in front of the opening 11, and thence over a pulley 1E) located adjacent to the edge of the top of the casing 1, bears upon its free end a suspended weight upper end of a-rod 21 which is pivotally mounted upon said carriage inthe rear of the nozzle and which stands substantially parallel to said blast-nozzle. Said rcd has a sleeve or roller 22 rotatable thereon adapted for engaging the flange or rim 23 of the tub 9, and has onits lower end a vdiskroller 24 adapted forengaging the body of the tub, as shown. Afbracerod 25,.preferably having a turn buckleadjustment, is pivotally connected at bath-tub 9 or otherV article to be acted upon,

throughout the several views-1 indicates a y 20 and has its opposite ends attachedto the Vits opposite ends to the blast-nozzle l2 and l the rod 21 at points above their pivotal mountings, whereby the relative positions or inclinations `of said nozzle and rod are maintained; that is, when the rod is caused to assume different positions or inclinations, the nozzle is automatically caused toassumelike, or substantially parallel, positions lor inclinations.

Now, as will be apparent, rotary motion communicated to the table 8 through the drive-shaft and gears causes the table to rotate,` carrying the tub mounted thereon. Owing to the rearwardly and downwardly directed stress placed upon-the upper end of the rod 21 through the cable 17, said rod is rocked back. and forth on its pivotal mountings as said tub is rotated, the sleeve or roller 22 and the disk-roller 24 being at all times maintained in contact, or operative engagement, with the flange or rim 23 and body, respectively, of said tub. In addition to the rocking movement of the rod 21 which occurs during the rotation of the tub,

the carriage is caused to move'back and' forth alon the runway constituted by the flanged guide-bars 16, the weight 20 upon the free end of the cable passed over pulley 18 serving/ to normally maintain the carriage in a forwardly-thrust position with the roller 22 in engagement with the rim 23, and the tub, as it approaches, in its rotation, a position in parallel alinement with the carriage, forcing said carriage rearward, the said parts moving from the positions shown in full linesin Fig. 3 to those shown in do-tted lines in said figure.v

The position ofthe mounting of the noz` zle 12 upon the carriage is such with relation to that of the rod 21 that blasts therefrom will be discharged against the interior surfaces Of the tub, being directedkdownward along the walls of the latter in such manner as to effect the abrasion of the surface presented to the blast from the top to the bottom of the tub wall. The curved form of the tub at the point where the sidewalls merge or join with the bottom causes the blasts directed downward along the inclined inner surface of the walls to glance inward along the bottom of the tub and to thusV effect the desired abrasion of the bottom.

When itis desired toA direct a blast up'n the top of the rim 23, it becomes necessary l to change the positions of the nozzle 12 and the rod 21 with relation to the tub so that the former will' stand (substantially vertical over said. rim. `The adjustment of the rod and nozzle so that they will occupy vertical positions is v.readily effected by bringing thel hook-end 26 of a rod 27, pivotally 4mounted upon thel rod 21, into interlocking engagement wlth a laterally-directed pin 28 carried by an upright standard' 29 fixed in a stationary position on the carriage. This, as is clearly apparent, causesbthe disk-roller 24 to be withdrawn` from engagement with thebody of the tub and the other parts to assume the positions clearly shown in Fig. 4.

For blasting the exterior surface of the tub, a second blast-nozzle 30 and actuating means therefor-is provided, said nozzle 30 being located in a -position for directing its blasts upward in an inclined direction against the outer surface of the tub. Said nozzle is fixed between parallel members .31 which have a suitable pivotal mounting 32 and to the upper ends of which is rigi ly/ connected v.the lower end of a rod 33 which extends upward throughvthe topor cover 2 and is movable in a longitudinal slot 34` provided in saidcover. lSlidably mounted upon said rod 33 is a sleeve 35 having rotatable upon its lower end a. roller 36 adapted Afor. engagement with the rim 23 of the tub. Lateraliy directed trunnions 37 carried by the upper end of said sleeve have rollers 38 mounted thereon, said rollers being adapted to travel upon the cover 2 on opposite sides of said slot 34. As is obvious, when a swinging -movement is imparted to the rod 33, the rollers 38 travel forward and backward, e'ecting the raising and lowering of the sleeve 35 along said rod to an eX- tent which serves to maintain the roller 36 .in engagement with the rim 23 of the tub throughout all the positions assumed by the latter in its rotation. Connected to the upper end of the rod 33 is one end of a cable 3 9 whichis thence passed over a pulley 4() located at a suitable point beyond the inner end of said slot 34, as upon a support 41 at the front end of the runway 16, thence over a pulley 42 located at an appropriate point, and has a weight 43 suspended from its opposite or free end, as shown.

As is obvious, the weight 43 serves to maintain the upper end of the rod 33 swung linward so that the roller 36 is at all times 1n engagement with the rim 23 of the tub, following said rim as the tub rotates. Consequently, the blast-nozzle 30,y which is rocked back and forth with the rod 33, is. at all times during the rotation of the tub maintained in an effective blasting position and, in a complete revolution of the tub,

subjects the entire exterior surface of the nozzle whereby the latter is caused to follow the movement of the rotated article.

2l A sand-blast apparatus comprising means for rotating the article acted upon, a blast-nozzle,'and means whereby said nozzle is automatically actuated to vary its posi,

tion toy direct constantly etfective blasts.

3. A .sandblast apparatus 'comprising means for rotating the article acted upon, a blast-nozzle, means for automatically actuating said nozzle to vary its angle of inclination with the variation of the angle ot inclination of the parts presented withinthe range of its blasts, and means for reciprocatin said nozzle cansinoit to follow the irregular surface lines Ioi the article.

il. rlhe combmauon with an article to be acted upon having an irregular surface, of

means tor rotating said article, a sand-blastv nozzle, means associated with said nozzle whereby it is actuated to follow the irregular surface lines of said article as the latter is rotated, and means whereby? the inclination of said nozzle is varied to a degree corresponding with the inclination of the surtace of the article presented to its blasts.

5. ln an apparatus for sand-blasting bat-htubs, means for rotating the tub, a blast-nozzle, means associated with said nozzle whereby the latter is caused to assume varying angles of inclination corresponding to the angles of inclination of the walls ot the tub v riage, a blast-nozzle pivotally mounted ony said carriage, means under the control of the rotating tub for .moving said carriage back and 'fort-hto maintain said nozzle in constant operative relation to said tub, and means under the control of the tub tor swinging said nozzle on its pivotal mounting to cause an equal angle ot inclination to the tub walls presented theretoto be constantly maintained. n

8. ln a sand-blast apparatus for bath-tubs, means forrotating the tub, a movable carriage, a blast-nozzle pivotally Inounted on said carriage for directing blasts against the interior walls of the tub,Y means controlled l by the rotating Atub whereby said carriage is mqved to maintain ther relation of said nozzie to the tub and whereby the angle of inclination of `the nozzle is .varied to correspond with the variations of inclination of the tub"`walls presented to said nozzle, and means for simultaneously directing blasts against the exterior walls of the tub.

9. ln a sand-bla st apparatus for bath tubs, means for rotating the tub, `a movable car riage, a blast-nozzle pivotally mounted on said carriage for directing blasts against the interior walls of the tub, means controlled by the rotating tub whereby said carriage is moved to maintain the relation of said nozzle tothe tub and whereby the angle of inclination of the nozzle is varied to correspond with the variations of inclination ot the tub walls presented to said nozzle, a sec ond nozzle adapted rfor 'directing blasts .against the exterior walls of thel tub, and

means controlled bythe rotating tub whereby the angle ot inclination of the second noz zle is varied.

l0. ln sand-blast apparatus tor bath-tubs, means tor rotating a tub, a movable carriage, a blastnozzle pivotally mounted on said carriage, ya rod pivotallyl mounted on said carriage adjacent to said nozzle, a connecting link between said rod and said nozzle, roller bearings carried by said rod in engagement with thetub, and means for moving the carriage to maintain such engagement throughout the revolution ot the tu 11. ln sand-blast apparatus for bath-tubs, means forv rotating a tub, a movable carriage, a blast-nozzle pivot-ally mounted on 'said carriage, a rod pivotally mounted on said carriage adjacent to said nozzle, a connecting link between said rod and said nozzle, a pair of roller'bea'rings carried by said rod in engagement with the tub, means for moving the carriage to maintainv such en gagement throughout the revolution of the tub, said bearings contactingv the walls ot the tub near its top and'near its bottom .and

adapted to hold said rod. substantially p'arallel to the part of the wall contacted, main taining the relative inclination of the nozzle to the part of the wall presented thereto substantially constant.

12. In sand-blast apparatus for bath-tubs,

meansfor rotating a tub, a blast-nozzle for directing blasts against the interior walls ot the tub, means for varying the posit-ion ot said nozzle to maintain its operative relation to the tub throughout the rotation ot the latter, a blast-nozzle for directing blasts against the exterior surface of the tub, and means controlled by thertating tub for varying the inclination Lof the last-mentioned nozzle to maintain its operative relation to the tub throughout the rotation of the latter.

13. In sand-blast apparatus for bath-tubs, means for rotating a tub, a blast-nozzle for directing blasts against the interiorwalls ot the tub, means for varying the position of rotated, maintaining said nozzle in operative 10 said nozzle to maintain its operative relarelation to the tub.

tion to the tub throughout the' rotation of In testimony whereof I aix my signature the latter, ablast-nozzle for directing blasts in presence of twosubscribing Witnesses.

5 against the exterior surface of the tub a A pivoted rod to which the last-mentioned ninz-v CHARLES W' EBELING zle is connected, and means controlled by l/Vitnessesv: the rotating tub whereby said rod-isaotuated to follow the .Walls of the tub as the latter 'is H. DUNLAP, i

BRUCE ,Moiugs 

